Noisy conversion of RAW files from Olympus/OM OM-1 in Lightroom / Camera Raw

[seantrow]

Issue: Noisy conversion of RAW files from Olympus/OM OM-1 in Lightroom / Camera Raw

• Lightroom Classic Version Number: 11.2 - Camera raw 14.2
• OS Version Number: Windows 11

Steps to reproduce:

1. Import ORF files from OM Systems OM-1
2. Turn off all detail corrections (noise filtering) for image if necessary

Expected result: Relative noise-free pixels at ISO 200 (verified in OM Workspace app)
Actual result: Noisy pixels (screenshots shown)

[seantrow]

No, by "accurately" I mean mathematically correct according to the data in the raw file and the proper de-mosaicing formula.  Of course for a noisy exposure this will include some noise.

[deejjjaaaa]

>  Of course for a noisy exposure this will include some noise.
which ACR/LR did - all the noise that was there 🙂 - go bother OM software developers as to why they did not !

[deejjjaaaa · Accepted solution]

> I believe that Adobe Camera Raw is not converting the raw sensor mosaic data to pixels accurately,

in this case OM software applies NR behind the scenes ... ACR shows typical results of conversion for severely underexposed raw shot